A42B3/288—Ventilating arrangements with means for attaching respirators or breathing masks

A—HUMAN NECESSITIES

A62—LIFE-SAVING; FIRE-FIGHTING

A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING

A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort

A62B18/04—Gas helmets

B—PERFORMING OPERATIONS; TRANSPORTING

B64—AIRCRAFT; AVIATION; COSMONAUTICS

B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT

B64D10/00—Flying suits

Abstract

1,005,187. Respiratory appliances. M. L. AVIATION CO. Ltd. March 9, 1962 [March 14, 1961], No. 9315/61. Heading AST. [Also in Division A3] A flying helmet has an oxygen mask 8 and ear buns 21, 22 which are movable inwardly towards the centre of the helmet against a bias on operation of a control means 36 to 40. The mask is secured by a resilient neck 9 to the front of the helmet which has a face opening 2 closable by a visor 3. The ends of a resilient pad 11 arranged over the mask are interconnected a cord 14, 15, 18, 19, 29, 30 which passes round the sides and back of the head and is supported in guides 27, 28 on the ear buns and in eyelets 31, 32 fixed to the helment. Near the rear of the helmet, the cord is attached to a further cord 34 wound on a capstan 36 which is operated through a gear 38 by a hand wheel 39 on the outside of the helmet. The ear buns are normally held away from the head by pairs of spring arms 23, 24 connected to the crown of the helmet On winding the further cord on the capstan, the cord interconnecting the two ends of the maskcovering pad is tightened to cause the application of the mask and the ear buns to the head of the wearer against the resilience of the flexible neck and the spring arms, respectively. Temple pads 43 and a back pad 47 are similarly normally held away from the head of the wearer by spring arms 45 and leaf springs 48, 49, respectively, and may be moved against the head of the wearer by tightening a cord 54<SP>1</SP> on rotating a second capstan 66 by a handwheel 73. A further pad 68 or a webbing harness may be supported within the crown of the helmet by leaf springs. Specification 1,005,186 is referred to.